Re: BB Chev HP
 

Thanks. That 143 MPH had me going. I still don't think that I have the areo dynamic drag right. If you have the time slip how close is this?


60 Foot ET = 1.2200
330 Foot ET = 3.5988
1/8 Mile ET = 5.6781
1/8 Mile MPH = 117.6483
1000 Foot ET = 7.4905
1/4 Mile ET = 9.0332
1/4 Mile MPH = 146.1391


Stan

Re: BB Chev HP
 

Stan, be careful trying to back into aero coefficients with data from Cecil County. That track is downhill, Literally, down hill quite a fair amount. Most people run a solid 2 MPH faster there.

Re: BB Chev HP
 

And the roll out is huge!

Re: BB Chev HP
 

Kevin / Glenn
Thanks. I can adjust the roll. But before this I have never changed it from the default 11.75" The low MPH reminds me of when I did a simulator of a Pro Stock Motorcycle some years ago. I said to the owner that the only way I could get the et to lineup with the MPH was to run out of RPM before the finish line. He laughed and said me too.

Stan

Re: BB Chev HP
 

Wow, just got on Google earth and the starting line is 336 Ft. and the finish line is 320 Ft. Yep, that is downhill. a lot of trees around there, too. Probably O2 rich at sometime of the year.

Re: BB Chev HP
 

Dyno HP 29.92 60 degrees dry air was 774 HP SF 901. Measured HP @ 6200 feet elevation was 564, 24.00 baro. A/S 396 375 dynos @ 620s 29.92 baro 60 degrees dry air and runs 9.80s, but have run 135 MPH in a 29.00 baro, SF 901

https://youtu.be/E8MsOGkaQus


https://youtu.be/E1Wz5qZDPAk

71 Camaro full interior NA production BBC 3400 pounds, 146.4 MPH on traction control, 821 dyno HP. 8 sec car.

Re: BB Chev HP
 

Adger,
Thanks for those numbers. I have never used Google earth. Could you check Capitol Raceway in Maryland. Just by looking down the track it seemed to me to be more down hill than Cecil.



Stan

Re: BB Chev HP
 

Thanks for the information.

Stan

Re: BB Chev HP
 

It's less than 1% (13.2') downhill or it would be a factored track...

There are a lot of downhill tracks without factors

Just sayin'